import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Random;

class Swipe {
    public static void main(String[] args) throws FileNotFoundException, IOException {
	if (args.length == 2) {
	    FileOutputStream fs = new FileOutputStream(args[0]);
	    int numOfBytes = Integer.parseInt(args[1]);
	    Random r = new Random();
	    byte[] buffer = new byte[1000];
	    for (int i = 0; i < numOfBytes; i += 1000) {
		r.nextBytes(buffer);
		fs.write(buffer, 0, Math.min(numOfBytes - i, 1000));
	    }
	    fs.close();
	}
    }
}